559_Sitka, AK_United States of America (the)
DatumValueDescription
Status14-Nov-2022Processing Date
Epoch01-Jan-1983 to 31-Dec-2001Tidal Datum Analysis Period
MHHW14.42Mean Higher-High Water (ft)
MHW13.64Mean High Water (ft)
MTL9.83Mean Tide Level (ft)
MSL9.80Mean Sea Level (ft)
DTL9.49Mean Diurnal Tide Level (ft)
MLW6.02Mean Low Water (ft)
MLLW4.56Mean Lower-Low Water (ft)
STND0.00Station Datum (ft)
GT9.86Great Diurnal Range (ft)
MN7.62Mean Range of Tide (ft)
DHQ0.78Mean Diurnal High Water Inequality (ft)
DLQ1.46Mean Diurnal Low Water Inequality (ft)
HWIUnavailableGreenwich High Water Interval (in hours)
LWIUnavailableGreenwich Low Water Interval (in hours)
Maximum19.30Highest Observed Water Level (ft)
Max Date & Time02-Nov-1948 22Highest Observed Water Level Date and Hour (LST)
Minimum0.51Lowest Observed Water Level (ft)
Min Date & Time04-Dec-2013 04Lowest Observed Water Level Date and Hour (LST)
HAT17.21Highest Astronomical Tide (ft)
HAT Date & Time22-Dec-1999 21HAT Date and Hour (LST)
LAT1.23Lowest Astronomical Tide (ft)
LAT Date & Time03-Jul-2000 16LAT Date and Hour (LST)
LEVUnavailableSwitch 1 (ft)
LEVBUnavailableSwitch 2 (ft)